Wall unit



FIG. 1 is a perspective view of a wall unit showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a side elevational view thereof; and

FIG. 4 is a top plan view thereof.

The rear of the wall unit is flat and unornamented. 

The ornamental design for a wall unit, as shown and described. 